package qlsl.androiddesign.api.manager;

import android.annotation.SuppressLint;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import qlsl.androiddesign.api.activity.R;
import qlsl.androiddesign.api.entity.commonentity.UpdateInfo;


public class VersionUpdateManager {

    private Context mContext;

    private String updateMsg;

    private String apkUrl;

    private Dialog noticeDialog;

    private Dialog downloadDialog;

    @SuppressLint("SdCardPath" )
    private static final String savePath = "/sdcard/apk/";

    private static final String saveFileName = savePath + "KnowLedge.apk";

    private ProgressBar mProgress;

    private static final int DOWN_UPDATE = 1;

    private static final int DOWN_OVER = 2;

    private int progress;

    private Thread downLoadThread;

    private boolean interceptFlag = false;

    private OnCancelListener onCancelListener;

    @SuppressLint("HandlerLeak" )
    private Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case DOWN_UPDATE:
                    mProgress.setProgress(progress);
                    break;
                case DOWN_OVER:
                    downloadDialog.dismiss();
                    installApk();
                    break;
            }
        }

        ;
    };

    public VersionUpdateManager(Context context) {
        this.mContext = context;
    }

    public void setOnCancelListener(OnCancelListener onCancelListener) {
        this.onCancelListener = onCancelListener;
    }

    /**
     * 检查更新
     */
    public boolean checkUpdate(UpdateInfo updateInfo) {
        if (AppMethod.getVersionCode() < updateInfo.getVersionCode()) {
            updateMsg = updateInfo.getUpgradeInstructions();
            apkUrl = updateInfo.getDownloadUrl();
            if (mContext == null)
                return true;
            showNoticeDialog(updateInfo.getVersion());
            return true;
        }
        return false;
    }

    private void showNoticeDialog(String version) {
        Builder builder = new Builder(mContext);
        builder.setTitle("发现新版本" + version);
        builder.setMessage(updateMsg);
        builder.setPositiveButton("下载", new OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                showDownloadDialog();
            }
        });
        builder.setNegativeButton("以后再说", new OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                if (onCancelListener != null) {
                    onCancelListener.cancel();
                }
            }
        });
        noticeDialog = builder.create();
        noticeDialog.setCancelable(false);
        noticeDialog.show();
    }

    private void showDownloadDialog() {
        Builder builder = new Builder(mContext);
        builder.setTitle("软件版本更新" );

        final LayoutInflater inflater = LayoutInflater.from(mContext);
        View v = inflater.inflate(R.layout.dialog_update_progress, null);
        mProgress = (ProgressBar) v.findViewById(R.id.progress);

        builder.setView(v);
        builder.setNegativeButton("取消", new OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                interceptFlag = true;
                if (onCancelListener != null) {
                    onCancelListener.cancel();
                }
            }
        });
        downloadDialog = builder.create();
        downloadDialog.setCancelable(false);
        downloadDialog.show();

        downloadApk();
    }

    private Runnable mdownApkRunnable = new Runnable() {

        public void run() {
            try {
                URL url = new URL(apkUrl);

                HttpURLConnection conn = (HttpURLConnection) url
                        .openConnection();
                conn.connect();
                int length = conn.getContentLength();
                InputStream is = conn.getInputStream();

                File file = new File(savePath);
                if (!file.exists()) {
                    file.mkdir();
                }
                String apkFile = saveFileName;
                File ApkFile = new File(apkFile);
                FileOutputStream fos = new FileOutputStream(ApkFile);

                int count = 0;
                byte buf[] = new byte[1024];

                do {
                    int numread = is.read(buf);
                    count += numread;
                    progress = (int) (((float) count / length) * 100);
                    mHandler.sendEmptyMessage(DOWN_UPDATE);
                    if (numread <= 0) {
                        mHandler.sendEmptyMessage(DOWN_OVER);
                        break;
                    }
                    fos.write(buf, 0, numread);
                } while (!interceptFlag);

                fos.close();
                is.close();
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    };

    /**
     * 下载apk
     */

    private void downloadApk() {
        downLoadThread = new Thread(mdownApkRunnable);
        downLoadThread.start();
    }

    /**
     * 安装apk
     */
    private void installApk() {
        File apkfile = new File(saveFileName);
        if (!apkfile.exists()) {
            return;
        }
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse("file://" + apkfile.toString()),
                "application/vnd.android.package-archive" );
        mContext.startActivity(i);

    }

    public interface OnCancelListener {

        public abstract void cancel();
    }

}
